Alasdair MacIntyre

In the [YOU] on AI Field Guide

[YOU] on AI opens with engineers in Trivandrum discovering that AI has multiplied their productive capacity twentyfold—and then immediately asking what, exactly, has been multiplied. The book’s answer is that the amplifier amplifies whatever signal you feed it. MacIntyre supplies the philosophical vocabulary for specifying what the signal is. He distinguishes between external goods—output, revenue, professional recognition, the things the market measures—and internal goods—the elegance of a well-designed architecture, the diagnostic intuition that comes from years of patient clinical engagement, the capacity to feel when a codebase is wrong before you can articulate why. AI amplifies the former with directness and efficiency. The latter it does not address at all.

This asymmetry is the structural feature of the AI moment that the popular discourse has most consistently failed to name. MacIntyre’s framework names it precisely, because his framework was built to identify exactly this kind of loss—the loss of goods that are invisible to any calculus that measures only output. The senior engineer who discovers that “the remaining twenty percent was everything” has stumbled upon the internal goods of his practice—the judgment, the architectural instinct, the taste—which had been masked by the implementation labor the machine now performs. MacIntyre would recognize the discovery immediately, and would add the qualification the engineer cannot yet articulate: those internal goods were cultivated through the implementation, not merely alongside it.

The cycle’s account of the “Luddites”—senior developers who resist AI because they perceive what is being lost without being able to name it—is, in MacIntyre’s terms, practitioners defending the internal goods of their practice against a market that values only the external goods. Their diagnosis is correct even when their response is strategically mistaken. And the cycle’s deeper hope—that the AI moment might be a revelation of what practitioners are really for, stripping away the implementation to expose the judgment beneath—is a hope that MacIntyre’s framework can both ground and discipline. The revelation is genuine only if the conditions for cultivating that judgment at the new level are deliberately preserved.

His later work, Dependent Rational Animals, deepens the analysis: human rationality is inseparable from embodiment, vulnerability, and social dependency. The machine’s “intelligence” is the intelligence of a system with no body, no vulnerability, no stake in the outcome. This difference is not incidental. It is the reason practical wisdom cannot be automated: it is exercised by a particular person, in a particular situation, with everything at stake for the kind of person she is becoming.

Origin

Born in 1929 in Stornoway, Scotland, MacIntyre was educated at Queen Mary College London and Manchester, and spent decades moving between British and American universities before settling at Notre Dame. His intellectual journey was as restless as his biography: a Marxist in youth, a Christian convert in mid-career, a devoted Thomist by his major works’ maturity. What connected these positions was a persistent dissatisfaction with the thinned-out moral vocabulary of liberal modernity and a conviction that the Aristotelian tradition, properly recovered, supplied what modernity lacked.

After Virtue (1981) opened with the thought experiment of a catastrophe in which all scientific knowledge was destroyed and then reconstructed from fragments—and argued that this was the actual condition of modern moral discourse: we possess the vocabulary of a tradition whose underlying framework we have lost. The argument made MacIntyre suddenly famous. Its sequels—Whose Justice? Which Rationality? (1988) and Three Rival Versions of Moral Enquiry (1990)—elaborated a position in which moral reasoning was necessarily embedded in particular traditions, and in which the tradition of Thomistic Aristotelianism was, on his view, the one best equipped to address its own limitations.

The concept of practice—a coherent, complex form of socially established cooperative human activity through which internal goods are realized—is the pivot of the entire framework. The definition is dense by design: every clause does philosophical work. The internal goods of a practice are recognizable only from within it. The standards of excellence that define it are historically extended and continuously argued about. And the virtues—justice, courage, honesty, practical wisdom—are not merely useful for pursuing those goods; they are constitutive of the good human life as such.

Key Ideas

Practices and internal goods. A practice, in MacIntyre’s precise sense, is not any activity but a historically extended, socially embodied cooperative activity through which goods internal to that form of activity are realized. The goods are internal because they can only be recognized by participation—the elegance of a well-designed software architecture, the diagnostic intuition of an experienced physician, the rightness of a spatial relationship in architecture. These are not the kind of goods that can be identified by someone who has not undergone the discipline. External goods—money, prestige, output—are different in kind: they can be achieved without participation, and their distribution is zero-sum.

The virtues as conditions of practice. Virtues are not instrumental to practices; they are constitutive of them. Justice, courage, honesty, and above all practical wisdom are the dispositions without which the internal goods of practices cannot be achieved. The chess player who lacks honesty to acknowledge superior play will not develop the perception of the internal goods that the opponent’s play reveals. The software engineer who lacks patience to sit with a system until its architecture reveals itself will not develop the embodied understanding that distinguishes the genuine practitioner from the merely competent technician. The machine possesses no virtues. It possesses capabilities—a fundamentally different category.

Techne and phronesis. MacIntyre draws on Aristotle’s distinction between techne—technical skill in making artifacts according to specified rules—and phronesis—practical wisdom in action, the judgment about what to do in particular, unrepeatable circumstances where the relevant considerations cannot be fully specified in advance. AI excels at techne. It cannot possess phronesis, because practical wisdom is exercised by a person with a history, a community, and stakes in the outcome—none of which the machine has. The collapse of the cost of techne does not produce phronesis; it reveals how much the latter was always the point.

Narrative unity and moral identity. MacIntyre argues that a human life has its unity as the unity of a narrative quest. We are not bundles of preferences or maximizers of utility; we are characters in ongoing stories, and the meaning of any action is derived from its place in that story. When AI disrupts the practices through which practitioners have constituted their moral identities—I am the person who builds, who solves, who creates—the disruption is not merely professional. It is existential, in the precise sense that it concerns the narrative within which the practitioner’s existence makes moral sense.

The tradition as living argument. A tradition, for MacIntyre, is not a static inheritance but a historically extended argument about the goods constitutive of a practice and the standards of excellence appropriate to it. Software engineering has such a tradition—from assembly to high-level languages to agile, each transition a debate about what good software is for. The AI moment is the latest chapter of that tradition. It destroys the practice only if practitioners cease to argue about the goods; it transforms the practice into something recognizable if the argument continues at the new level.